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Phylogeny, biogeography, systematics and taxonomy of Salicornioideae (Amaranthaceae / Chenopodiaceae) – A cosmopolitan, highly specialized hygrohalophyte lineage dating back to the Oligocene / Mikko Piirainen in Taxon, vol. 66, n°1 (Année 2017)

Public [article]  inTaxon > vol. 66, n°1 (Année 2017) . - pp. 109-132 Titre : Phylogeny, biogeography, systematics and taxonomy of Salicornioideae (Amaranthaceae / Chenopodiaceae) – A cosmopolitan, highly specialized hygrohalophyte lineage dating back to the Oligocene Type de document : texte imprimé Auteurs : Mikko Piirainen, Auteur ; Oskar Liebisch, Auteur ; Gudrun Kadereit, Auteur Année de publication : 2017 Article en page(s) : pp. 109-132 Langues : Anglais (eng) Mots-clés : Arthrocaulon  Arthroceras  biogéographie  Salicornia  Sarcocornia Résumé : " trnK) from 57 species, 9 subspecies, 1 variety and 2 hybrids representing all curently accepted genera using maximum likelihood, Bayesian analysis, fossil-calibrated molecular dating and ancestral area analysis. All molecular markers gave similar phylogenetic signals. Salicornioideae probably originated in Eurasia during the late Eocene–early Oligocene. The divergence of the early main clades took place in the middle Oligocene with the separation of Allenrolfea / Heterostachys, Halocnemum /Halopeplis /Halostachys /Kalidium and Arthrocnemum /Microcnemum /Tecticornia /Salicornia / Sarcocornia lineages. The latter lineage diversified most and comprises ¾ of the species of the subfamily. The Arthrocnemum macrostachyum /Microcnemum lineage diverged at the turn of the Oligocene / Miocene – while the Arthrocnemum subterminale, Tecticornia and Salicornia /Sarcocornia lineages were all present by the middle Miocene. Long-distance dispersal has taken place several times to the Americas (Allenrolfea /Heterostachys, Arthrocnemum subterminale, Salicornia /Sarcocornia), South Africa (Halopeplis, Salicornia /Sarcocornia) and Australia (Tecticornia, Salicornia /Sarcocornia). Most currently accepted genera were resolved as monophyletic. However, Sarcocornia is paraphyletic in relation to Salicornia, and Arthrocnemum proved to be polyphyletic. In addition, the name Arthrocnemum is a nomenclatural synonym of Salicornia. As a consequence, we propose the merging of Sarcocornia under Salicornia and provide 19 new nomenclatural combinations and one replacement name. For Salicornia (incl. Sarcocornia) we propose a new infrageneric classification to accommodate the four phylogenetically and geographically well-supported sublineages of the genus. We also propose abandoning the name Arthrocnemum in its current use, and describe two new genera, Arthrocaulon (Eurasia, Africa) and Arthroceras (North America), and provide three new nomenclatural combinations." (source : auteurs) Type de publication : périodique Référence biblio : Piirainen M., Liebisch O., Kadereit G., 2017 - Phylogeny, biogeography, systematics and taxonomy of Salicornioideae (Amaranthaceae / Chenopodiaceae) – A cosmopolitan, highly specialized hygrohalophyte lineage dating back to the Oligocene. Taxon, 66 (1) : 109-132. ID PMB : 69033 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69033 [article]

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